Hanging roof structure

Claim 1

In a hanging roof structure of a type which is supported at its periphery by a load dispersion ring of lattice construction and which is supported at its center by an attachment means, with the attachment means being supported by supporting cables secured between the load dispersion ring and the attachment means, so that the structure can function as a roof covering when carried on support columns or an outer wall of a building being covered thereby, the improvement in said roof structure comprising: a load dispersion ring in the form of a torsionally rigid, three-dimensional lattice structure constructed of prismatic lattice units which, when seen in plan view, are triangular in shape, each lattice unit further including: two inner corner junctions (9) facing the center of the load dispersion ring and an outer corner junction (8) facing away from the center of the load dispersion ring, all of said junctions being located in an upper plane, two inner (19, 19) and one outer (18) corner junctions located in a lower plane and corresponding to the junctions described for said upper plane, substantially vertically extending struts (11, 13, 13) connecting said corresponding corner junctions in said upper and lower planes, diagonal braces (20, 20) connecting each upper outer corner junction (8) with each lower inner corner junction (19) of a lattice unit, said lattice units being secured adjacent to each other with common upper and lower inner corner junctions, horizontal braces connecting said lower inner corner junctions to form a lower inner peripheral ring (23) of said load dispersion ring, horizontal braces connecting said upper inner corner junctions to form an upper inner peripheral ring 21 of said load dispersion ring, and said supporting cables extending between said central attachment means and said load dispersion ring being secured to said upper outer corner junctions and to said lower inner corner junctions.